Window-screen.



W. THOMPSON. WINDOW. SCREEN.

APPLICATION FILED FEB. 21, 1910.

Patented Mar. 21, 1911.

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llhll'llED ,dilATEd WILLIAM THOMPSON, 0F LQS ANGELES, CALIFORNIA.

WINDOVJ-SCREEN.

Specification of Letters Eatent.

Patented Mar; 211, Matt.

Application filed February 21, i510. Serial No. 545,212.

To all whom it may concern:

Be it known that 1, WILLIAM THOMPSON, a. citizen of the United States,residing at Los Angeles, in the county of Los Angeles 5 March 19,1895,the present invention being an improvement on the construction thereindisclosed.

he main object of the present invention is to provide means fordetachably securing the flexible screen to the sash so that thescreenand sash may be worked together or may be operated separately asdesired.

Another object of the invention is to provide improved means foroperation of the screen and particularly for maintaining the screen in asuit-able condition of tension.

A further object of the invention is to provide a screen of thischaracter with means for guiding the same accurately in its verticalmotion and for maintaining the closure at each sideot' the screen so asto prevententry of flies, etc., at such parts.

The accompanying drawings illustrate the invention, and referringthereto Figure 1 is a front elevation of the window withparts brokenaway to show the interior construction. Fig. 2- is a vertical sec-.'

tion on line av -m Fig. 1. Fig. 3 is a vertical section on line av -n2Fig. 1. Fig, fl is a horizontal section on line wi -w", Fig. 1.

' Fig. 5 is a detail vertical section on the line m -w Fig. 1.

The window frame comprises vertical side members 1, and'top and bottommembers 2, 3, each of said side members being hollow. Rollers at arerotatably mounted in the top and bottom members 2, 3 and flexiblescreens consisting for example, of wire cloth, indicated at 5, aresecured to and wound on said rollers and fastened at their ends to therespective sashes. Said sashes are shown as reversible, being providedwith guide strips 8 to which the sashes 6, 7 are pivoted at 8',

and said guide strips being connected by cross bars 15 and adapted toslide vertically in the window casing, being guided on the .usualguiding 'means on said member 1, and

provided with counterweight means. Said counterweight means are alsoutilized'for the retraction or tensioning of the window screens and forthis purpose the rollers 4 are provided respectively with drums 9, 10connected to the counterweight means. In the case of the upper rollerthe drum 9 thereof is connected to a cord 11 wound around said drum andpassing downwardly under a pulley 12 on a counterweight Y13, and thenupwardly over a pulley 14 on the side member 1 of the casing; thefarther end of said cord being attached to the side bar 8 for the uppersash so that the weight 13 tends both to hold the upper sash closed andto wind up the upper screen.

The side bar 8 for the lower sash 7 18 connected to cord 16 passing overpulley l7 and provided with a loop or pulley 18 at its end, and the drum10 of. the lower screen 5 is connect-ed to a cord 20 passing over theloop 18 and is connected to a. counterweight 21.

.The connection of the lower screen to the lower sash iiiay-- be madedetachable, an intermediate bar 28 being provided connected to the lowerscreen 5 and spring catches 29 being attached to the inner face of thebottom bar of the lower sash and provided with hooks 33 engaging slots30 in a metal plate 81 attached to the bar 28 and normally holding thescreen and sash in connect-ion. When it is desired to release the screenfrom the sash, the spring catches 9.9 are drawn forward by means ofbuttons thereon to release their hooks from the slots 30 so that thelower sash may be raised without throwing up the lower screen. It willbe understood, however, that any suitable detachable connection may beprovided between the screen and sash.

In the above described applicationof the invention to reversible sashesthe cross bars 15 of the guiding means 8 serve also as means forconnection ofthe screens, as above 3 described. The connection of thecord 20 by means of the pulley 17 not only serves to sustain the lowersash and tension the lower screen, but also takes up any stretch in thewhich the sashes 6, 7, slide, the side members 1 of the window framebeing provided with vertical grooves or'channels 35 in which the edgesof the screens 5 are guided and closely and passing over said pulley,other end ofsaid cord, a drum connected to confined, thereby prei cntingbuckling of the screens and also forming an effectual closure or bar tothe entrance of any flies.

Upper and lower guide rollers 36 and 37, respectively, are provided forcords l1 and 20, which serve as guides for the weights and prevent themfrom coming into contact with each other.

What I claim is In combinationwith a Window frame, a

sash sliding therein, aflexible screen detachably connected to saidsash, a roller on which said flexible screen is wound, a pulley irnthewindow frame, a cord connected to the-sash a pulley at the H saidroller, a second cord connected at one end to said drum and passing oversaid pulley at the end of the first-cord, and a counterweight at theother end of said second cord, whereby both of said cords are put underconditions of tension tending to draw the sash andscreen in oppositedirections and maintaining the screen in condition of tension.

In testimony whereof, I have hereunto set I my hand at Los Angeles,California, this 14th day of February 1910.

WVILLIAM THOMPSON.

In presence of ARTHUR P. KNIGHT,

FRANK L. A. GRAHAM.

